A full-scale experiment of a lattice telecommunication tower under breaking load

Szafran, Jacek; Rykaluk, Kazimierz

doi:10.1016/j.jcsr.2016.01.006

Cited by 23 publications

(7 citation statements)

References 18 publications

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“…Materials 2020, 13, x FOR PEER REVIEW 3 of 11 power transmission tower with a height of 46.05 m and a 7.14 m × 7.14 m base under the impact of wind is presented in [21][22][23].…”

Section: Methodsmentioning

confidence: 99%

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Fiber Bragg Sensors on Strain Analysis of Power Transmission Lines

Juraszek

2020

Materials

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The reliability and safety of power transmission depends first and foremost on the state of the power grid, and mainly on the state of the high-voltage power line towers. The steel structures of existing power line supports (towers) have been in use for many years. Their in-service time, the variability in structural, thermal and environmental loads, the state of foundations (displacement and degradation), the corrosion of supporting structures and lack of technical documentation are essential factors that have an impact on the operating safety of the towers. The tower state assessment used to date, consisting of finding the deviation in the supporting structure apex, is insufficient because it omits the other necessary condition, the stress criterion, which is not to exceed allowable stress values. Moreover, in difficult terrain conditions the measurement of the tower deviation is very troublesome, and for this reason it is often not performed. This paper presents a stress-and-strain analysis of the legs of 110 kV power line truss towers with a height of 32 m. They have been in use for over 70 years and are located in especially difficult geotechnical conditions—one of them is in a gravel mine on an island surrounded by water and the other stands on a steep, wet slope. Purpose-designed fiber Bragg grating (FBG) sensors were proposed for strain measurements. Real values of stresses arising in the tower legs were observed and determined over a period of one year. Validation was also carried out based on geodetic measurements of the tower apex deviation, and a residual magnetic field (RMF) analysis was performed to assess the occurrence of cracks and stress concentration zones.

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“…Materials 2020, 13, x FOR PEER REVIEW 3 of 11 power transmission tower with a height of 46.05 m and a 7.14 m × 7.14 m base under the impact of wind is presented in [21][22][23].…”

Section: Methodsmentioning

confidence: 99%

“…Such measurements can be made periodically but not continuously, and they are troublesome in practice. Usually, they are performed once every few years and continuous power transmission tower with a height of 46.05 m and a 7.14 m × 7.14 m base under the impact of wind is presented in [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Fiber Bragg Sensors on Strain Analysis of Power Transmission Lines

Juraszek

2020

Materials

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“…The experimental studies carried out by the author of this paper involved full-scale testing of six independent telecommunication towers. The assumptions of the tests, the equipment used, and details on how the tests were conducted and how measurements were taken are provided in [28][29][30][31][32][33]. The reader is kindly asked to refer to these papers so that it is not necessary to repeat such details here.…”

Section: Full-scale Testingmentioning

confidence: 99%

Using full‐scale tests results for designing of steel telecommunication towers

Szafran¹

2021

ce papers

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The main goal of this paper is to provide recommendations for designing state‐of‐the‐art and lightweight steel lattice telecommunication towers which offer the highest possible load‐carrying capacity. The design rules presented in the paper are based on experimental results obtained for two independent tower structures. Full‐scale facilities, namely 42‐m‐high towers were tested. Stresses in compressed legs of lower segments of the towers, displacements of their tops, and, notably, failure mechanisms are analyzed. Technical solutions including additional equipment, such as service platforms and cable and access ladders, are also considered. Means of reinforcing tower structures with a focus on modifying buckling strength of legs and diagonal bracings are also discussed and justified.

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“…For structural design and analysis of lattice towers, the current industrial tools are finite element (FE) software packages combined with established design codes [3][4][5][6][7][8][9][10]. The majority of the work in published literature with regard to lattice towers concerns the analysis of electricity transmission towers [11][12][13][14][15][16][17][18][19]. For the purpose of the work presented here, electricity transmission towers are particularly interesting because they have a mode of loading similar to that of wind turbines.…”

Section: Lattice Towersmentioning

confidence: 99%

Structural assessment of a lattice tower for a small, multi-bladed wind turbine

Axisa

Muscat

Sant

et al. 2017

Int J Energy Environ Eng

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This paper deals with a limit load assessment and preliminary experimental testing of a lattice-type steel tower used to support a newly designed, prototype small wind turbine having nine blades and a rotor diameter of 3.4 m. Small wind turbine and structural engineering codes of standards were followed with the purpose of implementing a system that meets European Union countries' legislation. The supporting lattice tower structure was subjected to a full-scale load test. This test verified that the structure can withstand the design loads. The finite element software ANSYS Mechanical was used to model and analyse the actual structure, and to determine the possible failure modes and their associated load levels. The most probable mode of failure for such a structure was found to be elastic buckling of the main corner posts. A number of finite element lattice tower models utilising different modelling strategies and solution methods are presented and analysed. The paper highlights the importance of using non-linear analyses as opposed to linear analyses and gives recommendations on the most reliable available modelling technique. Computational analyses' results are compared with measurements from a full-scale test on the tower structure.

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A full-scale experiment of a lattice telecommunication tower under breaking load

Cited by 23 publications

References 18 publications

Fiber Bragg Sensors on Strain Analysis of Power Transmission Lines

Fiber Bragg Sensors on Strain Analysis of Power Transmission Lines

Using full‐scale tests results for designing of steel telecommunication towers

Structural assessment of a lattice tower for a small, multi-bladed wind turbine

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